Sound clarifying device



NOV- 10, 1931. E, G, scHLoss ET AL 1,830,812

SOUND CLARIFYING DEVICE Filed Feb, ll, 1950 Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE EDWIN G. SCHLOSS .A ND'MYRON J. SCHLOSS, 0F NEW YORK, N. Y.

SOUND CLARIFYIN G DEVICE Application led Februaryll, 1930. Serial No. 427,474.

This invention relates to a device for clarifying the sound produced by electrostatic transmitters or electrodynamic oscillators issued from a loud speaker located in the 6 sound chamber of a cabinet having a radio or phonograph, by the application of acoustical principals, so that the length of the reverberations of the sound issued bv the loud speaker will be in proper relation to the acoustic properties of the room or studio 1n which the apparatus is located.

The object of the invention is to provlde a radio cabinet or the like with a sounding board, located below the loud speaker unit l5 whereby the sound produced by the loud speaker is ditfracted downwardly so as to impinge or strike against the sounding board.

'Another object of the invention is to so position the sounding board at a predetermined .distance and angle in its relation to the sound issuing from the loud speak-er, so that the sound will be modulated and lneutralized in any defective annunciation of the loud speaker. v

Another object of the invention is to provide a radio cabinet with an adjustable sounding board below the mouth of the loud speaker in close proximity to the sound cham- And still another object of the invention is to provide a radio cabinet with adjustable means for difracting the sound from the loud speaker in relation to the acoustical properties or conditions of the room or studio in which it is located.

With these and other objects in view, the invention consists of certain features of construction, as hereinafter shown and described and then specifically pointed out in the4 claims. v

A practical embodiment of the invention is represented inthe accompanying drawings forming part of this specification, in which `similar characters of reference indicate cor- .45 responding parts in all the views.

Fig. 1 represents a perspective view of a radio cabinet showing the sounding board in a horizontal position.

Fig. 2 is a vertical cross-section of the cabinet on a larger scale, showing the relative lower location of the radio chassis, the loud speaker and the sounding board, and

Fig. 3 is an inverted cross-sectional plan View taken on the line 3 3 of Fig. 2.

In the drawings the numeral l0 designates 55 a radio cabinet of which the legs 11 are preferably made square. The upper section 12 0f the cabinet is divided into an upper and av compartmentA 13-14 respectively. Into the upper compartment 13 is arranged a 60 radio chassis-15 and into the lower compartment or the sound chamber '14 the loud speaker 16. The top 17 of the cabinet is hinged at the back at 18. The front panel 1S- is hinged to the' cabinet at 2O and may be 65 swung outward to a horizontal position asindicated in dotted lines at 21 for the manipulation of the radio set.

The loud speaker 16 is located in the sound chamber 14 directly underneath the radin 7U chassis 15 with the mouth 22 mounted in a horizontal position, so that the sound will be projected downward 011 to the sound board 23. The back panel 24 of the sound chamber 14 is hinged at 25 to the back of the cabinet 7 l 10, the object thereof is so as to regulate the volume of air into the sound chamber.

The loud speaker 16 is supported and fastened on to a horizontal shelf 26 provided with an opening 27 to register with the open- 80 ing 28 of the loud speaker 16. It is to be understood that the loud speaker and the radio chassis will be hooked up in the usual Way, peculiar to their individual design and construction.

The sounding board 23 located below the loud speak-er 16 has the corners 30 cut out so as to loosely fit against the inner square edges of the legs l1. The lower portion of the cut out is beveled at 31 so 'as to allow the 90 sounding board to be tilted to a degree best suited to the acoustic condition of the room or studio. The sounding board 23 is held in a locked position in relation to the legs 11 by soft-rubber tips 32 which are fastened t0 95 the ends of rods 33, slidingly mounted in bearings 34 attached to the under part of the sounding board.

In close proximity to the inner ends of the rods 33 are fastened small lugs 35 which sur- 100 round the rod and also projecting outwardly to form a hand grip. Interposed between the lugs 35 and surrounding the rods 33 is a coil spring 36 which has a tendency to keep the lugs apart, so that the soft rubber tips 32 coact with the inner portions of the legs 11 and will hold the sounding board 23 in a predetermined position. When it becomes necessary to change the location of the sounding board. the lugs 35 are pressed together and after the position is determined, the pressure is released from the lugs and the springs will force the rubber tips against the legs thereby holding the sounding board in a xed position.

^ We claim 1. A device for clarifying sound comprising a cabinet having legs and a chamber, a loud speaker with its mouth pointing downwardly located in the chamber, a sound board arranged between the legs below the mouth 'of the speaker to dilract the sound vibrations issuing from the mouth of the speaker, and means including rods slidingly mounted on the board engaging the legs for adjusting the board.

2. A device for clarifying sound comprising a cabinet having legs and a chamber, a loud speaker with its mouth pointing downwardly located in the chamber, a sound board arranged between the legs below the mouth of thespeaker to diiiract the sound vibrations issuing from the mouth of the speaker, and means including pairs of rods slidingly mounted on the board engaging the legs for adjusting the board to move it to and from the mouth of the speaker.

3. A device for clarifying sound comprising a cabinet having legs and a chamber, a

loud speaker with its mouth pointing downwardly located in the chamber, a sound board arranged between the legs below the mouth of the speaker to diiract the sound vibrations issuing from the mouth of the speaker, and means including pairs of spring pressed rods slidingly mounted on the bottom ofthe board engaging the legs for adjusting the board to tilt it or to position it at any angle to and from the mouth of the speaker.

4. A device for clarifying sound comprising a cabinet having legs and a chamber, a loud speaker-with its mouth pointing downwardly located in the chamber, a sound board arranged between the legs below the mouth of the speaker, and pairs of spring-actuated rods mounted on the board, said rods each having a tipped rubber end to clutch the inner portion of a leg thereby locking the board to the legs.

Signed at New York, inI the county of Bronx and State of New York,l this 8th day of February, A. D. 1930.

EDWIN G. SCHLOSS. MYRON J. SCHLOSS. 

